细胞发生的

These mammary stem cells ensure the regeneration, galactopoiesis and degeneration of mammary gland in repeated pregnancy and birth.

因此，研究大鼠胚胎期和出生早期乳腺的各个发育阶段的形态学特点、各种细胞成分的组成和分布规律，以及乳腺干细胞在各个时期的特点将帮助我们更深入地了解乳腺的发生、发育以及乳腺干细胞的生物学特性，并有助于了解乳腺干细胞与乳腺发育、再生、癌变之间的关系。

It was also found that the chromosomes paired well and formed a rod heteromorphic bivalent in the hybrid F1[73(36)9-1×CSDT 1BL]. Whereas 73(36)9-1 produced mainly configuration of 20''+1'+t' when test-crossed with CSDT 1BS. It showed that the translocation occurred on chromosome 1B short arm, and this segment came from rye chromosome 1RL. In the present paper we discussed also the way in which the translocation might be caused, and concluded that it was formed through reunion of two kind telocentrica (1BL and 1RL) after simultaneous misdivision of two univalent chromosomes (a wheat chromosome 1B, and a rye 1R).

同时还发现，73（36）9-1和"中国春"双端体的1BL能很好地配对并形成一个棒状的异形二价体，而它和CSDT 1BS的染色体则主要产生20+1′+t′的构型，从而证明易位发生的可能途径，推断是由于在F1花粉母细胞中的两个单价体（一个是小麦染色体1B，一个是黑麦染色体1R）同时进行错分裂之后产生的两种端着丝点染色体（1BL和1RL）重新并合形成的，因而冬小麦73（36）9-1可能是一个自发产生的易位系。

The multicellular condition arising from the differentiation of the kingdom Metazoa would have constituted a critical constraint in determining the differentiation between somatic and germinal histone H1 types, arising from a recurrent duplication process under strong purifying selection.

从王国 metazoa 的区别出现的多细胞的情况在身体的和幼芽的 histone h1 类型之间决定区别，从在强壮的净化选择下面的一个再发生的副本程序出现方面会构成一个紧要关头的限制。

Tenella infection, nitric benzene could interdict the entering of the parasite, it could ease the injury of the host cell and have certain protection to the chicken body ,but with the developing of the disease ,its function descend,but the time of the oocyst discharging was prolonged.

tenella病发生的早期，硝苯地平可以阻断球虫的侵入，减轻宿主细胞的损伤，对鸡体有一定的保护力，但随着疾病的发展，其作用下降，但使E。 tenella卵囊的排出时间推后。

AIM: To observe the expression and distribution of C5a receptor(C5aR) on epiretinal membranestissue from patients with proliferative retreous body retina lesion and cultured retinal pigmentary epithelial cells.

目的 ：检测手术中取出的增生性玻璃体视网膜病变患者的视网膜前膜组织及培养的人视网膜色素上皮细胞中的C5a受体(C5aR)的表达及分布，阐明C5a受体在发生PVR的病理过程中可能的作用。方法：手术取出ERM组织，常规制备石腊切片。

RESULTS:After pinealectomized mice was irradiated WBI with 75 mGy X-rays,we found levels of plasma corticosterone increased obviously,and the effects of the proliferative reaction of splenocytes to ConA and spontaneous proliferation of thymocytes was found to be decrease. But injecting melatonin into pinealectomized mice or putting melatonin in the cultured cell,its immune functions might renew the enhancement.CONCLUSION:Melatonin of pineal gland might regulate the immunoenhancement induced by low dose radiation.MeSH Pineal body; Melatonin; Radiation; Corticosterone; Immunity,cellular

低剂量辐射(low dose radiation，LDR)全身照射(whole body irradiation，WBI)可引起免疫系统的兴奋效应，主要表现在以T淋巴细胞功能激活为主的细胞免疫和体液免疫功能的增强并可提高机体的抗瘤作用［4，5］，在LDR诱发免疫功能增强的同时伴有下丘脑-垂体-肾上腺皮质系统功能下调等神经内分泌功能的改变，神经内分泌对免疫系统的调节可能是LDR免疫兴奋效应发生的必要条件，松果腺MLT与辐射免疫兴奋效应的关系值得研究。

Under the superfusion of low potassium Tyrode's solution, EAD were relatively easy to occur in both mouse atrial and ventricular fibers, suggesting the close relation between the potassium currents and the generation of EAD.

我室以往的工作表明：小鼠心肌是研究EAD的理想标本。既使轻微的低钾（3mM 〓）条件也足以诱发小鼠心房肌和心室肌的EAD（尽管二者难易度上存在差别），提示小鼠心肌细胞上的钾电流与EAD的发生关系密切。

One possibility, she says, is that the altered cells become so engorged with unburnt fat, they become "diabetic", no longer accepting signals from the hormone insulin, which normally triggers the absorption of glucose from the bloodstream.

她说，她的研究小组的研究结果为解释这种现象是如何发生的提供了新的线索，并可能有助于解释成年人是如何患上II型糖尿病的。其中一种可能，是变异细胞充满了太多未燃尽的脂肪，他们也患上了"糖尿病"，不再接受胰岛素正常发出的从血液中吸收葡萄糖的信号。

The Vg-negative reaction of the triploid female rainbow trout could not provide full evidence for the impossibility of liver to synthesize Vg. That Vg was not synthesized resulted from insufficient estradiol due to the retardation of ovaries development, the un-differentiation of follicular cells and the lost interaction of germ cell and somatic cells. It could be concluded from yolk genesis that the shortage of female triploid rainbow trout's Vg resulted from the abortive ooecium, but did not result in sterility.

由于三倍体雌性虹鳟卵巢发育受阻，无滤泡细胞分化，生殖细胞与体细胞的互作缺失，不能分泌足量的17β-E2以诱导Vg的合成，因而肝脏的Vg阴性并不能说明肝脏不具备合成Vg的能力，从卵黄发生的角度分析，卵黄蛋白原的缺乏不是导致三倍体虹鳟雌性不育的原因，而是其卵泡败育的结果。

In the early 1980s, many researchers revealed the structure of cytoskeleton mainly on kinetosome in the cortex by the employment of protargol staining and ultrastructure method, and thus the configuration, development and mechanism of cortical ciliatures were discussed, which was the major tide in the studies of cell biology of protozoa.

但是，目前仅对草履虫、四膜虫中分散排布的体纤毛基体的装配有较深入的了解，而对不同种纤毛虫的毛基体特别是紧密聚集排列的纤毛器基体微管的装配和基体微管装配在细胞内的启动和发生过程尚未进行深入的研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷